The best way to know that D is not the right answer is to note that C is not correct. C says that the Republicans nominated Franklin D. Roosevelt for president. But that is not true. Roosevelt was a Democrat. He ran against Herbert Hoover, the incumbent Republican, in 1932.

When Roosevelt won in a landslide, it was not at all unexpected. People blamed the Republicans for the Depression (making A correct) and expected that they would lose the election (making B incorrect). So, the right answer is A.